Floor mat for a vehicle



FIG. 1 is a front, top and right side perspective view of a floor mat for a vehicle showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a right side elevational view;

FIG. 4 is a front elevational view;

FIG. 5 is a rear elevational view; and

FIG. 6 is a bottom plan view. 

The ornamental design for a floor mat for a vehicle, as shown and described. 